\(815+|95|+\left(-815\right)+\left(-45\right)\)

\(=815+95+\left(-815\right)+\left(-45\right)\)

\(=815+95-815-45\)

\(=\left(815-815\right)+\left(95-45\right)\)

\(=0+50\)

\(=50\)

815+I95I+(-815)+(-45)

=815+95-815-45

=(815-815)+(95-45)

=0+50

=50

815+[95+(-815)+(-45)]

\(=\) 815+(95-815-45)

\(=\) 815+95-815-45

\(=\) 50

815+[95+(-815)+(-45)]

= 815 + ( 95 - 815 - 45 )

= 815 + ( - 765 )

= 50

815+[ 95+(-815) + (-45)]

=50

815 + 95 + ( -815) + ( -45)

= [815 + (-815)] + [95 + (-45)]

= 0 + [+(95 - 45)]

= 0 + 50

= 50

   815 + 95 + (-815) + (-45)

= [815 + (-815)] + [95 + (-45)]

= 0 + 50

= 50

Mình xin được trả lời :

815 + 95 + (-815)+(-45)

= [ 815+(-815) ] + [ 95+(-45) ] 

= 0 + 50

= 50

Ai k nhanh mình sẽ k lai vi minh co nhieu nick lam

= 815 +95 + (-815) + (-45) 

= [815+(-815)] +[95 + ( -45)] 

=0+50=50

các bạn li-ke mình cho tròn 325 với 

815+[95+(-815)+(-45)] 

= 815+[-765)]

= 50

815+[95+(-815)+(-45)]

=815+95+(-815)+(-45)

=[815+(-815)]+[95+(-45)

=0+50

=50

=815+(-765)

=815-765

=50

815+[95+(-815)+(-45)]= 815+95-815-45=(815-815)+(95-45)=0+50=50

= 76565 

815[95+(-815)+(-45)

=815[-720+(-45)]

=815(-765)

=-623475

mik nha!

­

  815{95+[-(815+45)]

=815{95+(-860)}

=815.(-860)

=-700900

a) \(A=455+\left(-311\right)+3789+\left(-144\right)\)

\(\Rightarrow A=455-311+3789-144\)

\(\Rightarrow A=144+3645=3789\)

Vậy A = 3789

b) \(B=815+\left[95+\left(-815\right)+\left(-45\right)\right]\)

\(\Rightarrow B=815+\left(95-860\right)\)

\(\Rightarrow B=815-770=45\)

Vậy B = 45

\(=\)815\(-815+90-45\)

\(=90-45\)

\(=45\)

45

\(815+\left[95+\left(-815\right)+\left(-45\right)\right]\)

\(=\left[815+\left(-815\right)\right]+\left[95+\left(-45\right)\right]\)

\(=0+50\)

\(=50\)

=50